package com.example.filter;


import com.alibaba.fastjson.JSON;
import com.example.common.BaseContext;
import com.example.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
@WebFilter(filterName = "LoginCheckFilter", urlPatterns = "/*")
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher antPathMatcher = new AntPathMatcher();


    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;


        String requestURI = request.getRequestURI();


        String[] url = new String[]{
          "/employee/login",
          "/employee/logout",
          "/backend/**",
          "/front/**",
          "/common/**",
          "/user/sendMsg",
          "/user/login",
          "/doc.html",
          "/webjars/**",
          "/swagger-resources",
          "/v2/api-docs"
        };

        boolean check = check(url,requestURI);

        if(check){

            filterChain.doFilter(request, response);
            return;
        }

        if(request.getSession().getAttribute("employee")!=null){
            Long id = (Long) request.getSession().getAttribute("employee");
            BaseContext.setThreadLocal(id);
            filterChain.doFilter(request, response);
            return;
        }

        if(request.getSession().getAttribute("user")!=null){
            Long userid = (Long) request.getSession().getAttribute("user");
            BaseContext.setThreadLocal(userid);
            filterChain.doFilter(request, response);
            return;
        }

        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
    }


    public boolean check(String[] url,String requestURI){

        for (String s : url) {
            if (antPathMatcher.match(s, requestURI)) {
                return true;
            }
        }
        return false;
    }
}
